Marzahn is a district in Berlin and was once the largest prefabricated housing estate in the DDR. The very tall skyscrapers, up to 21 storeys high, seem to stretch far into the blue sky. I spent two weeks in Marzahn in the summer of 2017, walking up and down the stairs of the giants. The sound in the stairwells was monotonous, quiet and full of history. I started chanting in the stairwells and it echoed back in different resonances.